4 month sleep regression

Ok, my DD is 17 weeks. Has always slept badly (3/4 hours at night is great, usually every 1/2). Lots of my friends are having a real nightmare with sleep regression (theirs all seemed to sleep through fairly early) However our LO is just starting to sleep a bit better, slightly longer during feeds at night etc.

DD seems to be doing lots of the developmental things linked to the regression, reaching out, holding things, everything in mouth, lots of babbling and squealing, trying very hard to roll etc.

Do all babies go through sleep regression? I'm starting to wind myself up waiting for it to come and dreading the lack of sleep etc.